Bobbin



5. J. HUBBARD.

BOBBIN.

APPLICATION FILED MAYIz. 1919.

1,388,952. PatendAug. 30, 1921,.

` l IIIII UNITED STATES 'PATENT 'oi-Fica man. v:1. miniem, or BEBWYN more.

BOBBIN.

'Application ined may 12, 1919. serial in. 296,598.

To all whom t may concern:

Be it known that I, EBER J. HUBBARD, a citizen of the United States, and a resident of Berwyn, in the county of Cook and State ing base therefor with means for connect-v ing the base in driving relation with a rotating pedestal from which a pivot spindle extends upwardly through the bobbin shank.

Heretofore, they have been constructed entirely of wood and such construction has many disadvantages. In the first place, wood is becoming scarce and expensive. In the second place', wood is easily chipped and split and tends towarp, and will readily burn. Furthermore in order to get the necessary strength, the wood must be of considerable thickness and this of course reduces the capacity of the bobbins in propor- V tion to their diameter.

The4 object of my invention is to overcome the disadvantages of wooden bobbins by constructing' them entirely of sheet metal preferably steel. Thin sheet steel can be used, the bobbin part being formed and connected together to produce a rigid and strong structure. Owing to the thinness ofthe metal, the shank diameter can be materially reduced giving a corresponding increase ink the space available for holding yarn or thread.

. One of the important features in my con struction resides in the provision of nonmetallic filler bushings at the bobbin ends for accurately seating the bobbin on the supporting pedestal and spindle to thereby accurately center the bobbin on the rotating support.

A bobbin constructed in accordance with my invention is shown on the accompanying drawing in which- Figure 1 is a side elevational view,

Fig. 2 is a sectional view on plane 2 2,

Fig. 1,

ig. 3 is a view of the lower end,

Fig. 4 is an enlarged sectional view on plane 4-4, Fig. 2, and

Fig. 5 is an enlarged sectional view on plane 5-5, Fig. 2.

The shank S of the bobbin is cylindrical and is formed by rolling a rectangular blank of sheet metal and securing its edges together. Such securin may be accomplished in a variety of ways, t e arrangement shown comprising tongues 10 deflected radially inwardlyto engage underneath the opposite edge'of the shank as clearly shown in Fig. 4, the .tongues and engaging edges being then soldered, brazed or spot welded together, a rigid cylindrical shank being thus formed whose edges are closely held together.

The base B is drawn integral from a sheet metal blank and is of larger diameter than the shank. It comprises the cylindrical side walls 11, the top wall or Hange 12 extending horizontally inwardly, and the lower inwardly extending inclosing flange 13. The inner diameter o the flange 12 is equal to or slightly less than the inner diameter 'of the shank, and is provided with `the peripheral notches 14 through which extend the tongues 15 on the lower end ofthe shank wall. After application of the shank on the base and insertion of the tongues through the slots the-tongues are bent laterally radially and spot welded or otherwise secured against the inner side of the flange 12. After securing together of the shank and base these parts will be concentric, the shank resting on the base adjacent the inner edge of the Han e 12.

y improved sheet metal bobbin is designed to take the place of the wooden bobbins now in eneral use. The winding machines in which these wooden bobbins have been used are provided with the rapidly rotated pedestals 16 from which extend the spindles 17 which at their lower ends adjacent the pedestals are enlarged to form the cylindrical alining extensions 18 for engaging in the bases of the bobbins. From the alining lug on each pedestal a tooth 19 extends radially for receiving notches cut in the sides of the bobbin base. The pedestal, spindle, alining extension and tooth are shown in dotted lines in Fig. 2. In order 'to compensate for the difference in internal diameters between wooden bobbins and sheet metal 'bobbins at their bases, I provide a filler bushing 20 in the base of my sheet metal bobbin, this bushing fitting in the sheet metal base and having an internal diameter equal toy that of the alining extension 18 on the supporting pedestal. The bushing is held securely in place by means of the inturned flange 13 of the base, this flange being formed after the bushing has been inserted. After insertion of the bushing and turning over of the iange the bushing and adjacent sheet metal sides are cut radially to form the slots 21 for receiving the tonguesy upper end of the bobbin and to keep it alined on the spindle 17. As shown, a strengthening ring 22 of L shaped cross-section is in.- serted in the bobbin end and has the central opening 23 through which the spindle 17 extends, the edge of the ring adjacent said opening being preferably deiected downwardly to form a strengthening flange 24. The ring -is secured in the bobbin end by spot welding or otherwise and is seated with its upper end a distance below the upper end of the shank in order that there is Suthcient metal left for turning inwardly to form a retaining flange 25 for a bushing 26. The bushing is applied against the horizontal seat of Ithe ring and the flange 25 then formed to hold the bushing securely in place. The bushing has the central opening 27 for snugly engaging with the spindle 17 the ring opening 23 being of larger diameter so that the ring does notl touch the spindle. With my improved arrangement the comparatively soft bushings at the lower and upper ends of the bobbin fit the alining lug 18 and the spindle 17 respectively and keep the bobbin accurately alined concentrically with reference to the spindle and pedestal axis during rotation of the pedestal.

I thus produce a strong, light and rigid bobbin which overcomes all the disadvanta es of the heretofore used wooden bobbins.

aving described my invention, I claim as follows:

1. A bobbin of the class described, comprising a cylindrical base of sheet metal, having a central opening in its top wall, a cylindrical shank of sheet metal seated on said base and havin tongues spot welded to the base top, an a ining bushing of comparatively soft material inserted in said base, the llower edge of said base being flanged inwardly to secure the alining bushing, said bushing and base side walls having tooth receiving slots, a strengthening sheet metal ring secured in the upper end of said shank, a bushing of lcomparatively soft material seated on saidring, the upper edge of said shank being ilangedinwardly to secure said bushing to the ring, said bushing having a central opening for receiving a spindle. v

2. A bobbin of the class described com prising a cylindrical sheet metal shank having tongues extending from one edge and spot welded to the opposed edge, a cylindrical base of sheet metal concentric with said shank, said base having an opening in its top wall in register with said shank lower end,.tongues extending from the lower end of the shank and spot welded4 to the base upper wall, an alining bushing secured in said base, said bushing and base sides having registering notches for receiving a driving tooth, and an alining bushingy securedl in the upper end of said shank.

A bobbin of the class described comprising a cylindrical sheet metal base, a cylindrical shank of sheet metal secured to the base concentric therewith, an alining bushing secured in said base, a seating rin secured in.' said shank near the upper en thereof, and an alining bushing seated on said ring, the end of said shank being flanged inwardly a distance againstthe top ofsaid b ushing to firmly secure said bushing on said ring.

In witness whereof, hereunto subscribe my name this 8 dag of Mey A. D., 1919.

` Y BER HUBBARD- 

